Improvement in doffer-strippers for carding-machines



A. M. BUMSTUCK.

Buffer Strippers for Carding-Machines.

I No. 133,832. Patented Dec.10,1872.

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ALBERT 'M. OOMSTOCK, OF HOLDEN, MASSACHUSETTS.

IMPROV EMENT IN DOFFER-STRI PPERS FOR CARDlNG-MACHINES.

Specification forming part of Letters Patent No. 133,832, dated December10, 1872.

exact description of the same, reference being had to the accompanyingdrawing forming a part of this specification, in which- Figure 1represents a plan View of such portions of a carding-machine as arenecessary to illustrate my improvement; Fig. 2 represents a verticalsection of the same on line A B, Fig. 1; and Fig. 3 represents aperspective view of portion of my improved stripper.

To enable those skilled in the art to which my invention belongs to makeand use the same, I will proceed to describe it more in detail.

My invention pertains to an improvement in the construction andarrangement of a strip per, with a view of enabling it to support orcarry the stock or roving during its passage from the dofter to thecondensin g-roll's,- and to deliver the stock to said rolls withoutliability of its being wound up on the blades.

In the drawing, A represents the frame; B,

the doffer; G, D, and E, the condensing or rub rolls; and F, thestripper. The usual construction of dofi'er and condensing-rolls isshown, the former being provided with rings of card- -clothing a, eachof which collects sufficient wool to form a stand of roving, and theupper roll D having a laterally-reciprocating motion to impart thedesired density and uniformity to the roving. The stripper consists of aseries of steel or other metal blades, b, rigidly secured to a'shaft, f,at suitable intervals of space. Each blade is parallel to the shaft,

projectsradially outward, and has a serrated or toothed edge,c. Thisedge .is beveled on the side which, in practical operation, first comesinto contact with the wool on the dofi'er.

The direction of rotation of the several rollers is indicated bythe'arrows.

The stripper takes the wool from the rings a of the dotfer, and, byreason of the serrations or teeth of its blades, as wellas its localrelation to the doffer and condensing-rolls, supports the strands duringtheir passage to said rolls, thus preventing the stoppage of the machinein consequence of the parting or falling of the strands, as frequentlyresults in the use of other strippers, particularly if short or badstock be used.

The practical or comparative value of this mode of supporting the stockis, however, directly modified by the necessity of providing for thesame being taken off the toothedblades without resistance or obstructionsufficient to render it liable to be wound up on the stripper. Tofacilitate and insure such delivery and result is the function of thebeveled edge of the blades. Thus the serrating andbevel ing of theblades bear a necessary functional relation to each other, modified tosome extent by the arrangement of the stripper with reference to thedofi'er and condensing-rolls.

Diselaiming fixed or serrated blades, per so or broadly,

I claim as novel and of my invention- The stripper F, composed ofserrated or toothed blades 1) c rigidly secured to a shaft, f, andbeveled on one side, as specified, when arranged with the doffer B andcondensing or rub. rolls 0 D E, "as shown and described, whereby it isadapted to support and deliver the stock, as set forth.

- ALBERT M. OOMSTOCK.

Witnesses THos. 11.. DODGE, A. E. PEIRCE.

